v3.26.1
Additional disclosure requirements - Condensed Cash Flow Statements (Details) - EUR (€)
€ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
1. Cash flows from operating activities    
Consolidated profit € 9,414 € 7,463
Adjustments to profit 12,668 17,400
Net increase/decrease in operating assets (101,714) (33,806)
Net increase/decrease in operating liabilities 62,773 12,664
Reimbursements/payments of income tax (2,400) (1,117)
CASH FLOWS FROM OPERATING ACTIVITIES (19,259) 2,604
2. Cash flows from investing activities    
Investments (-) (9,621) (4,247)
Divestments (+) 15,894 3,684
CASH FLOWS FROM INVESTING ACTIVITIES 6,273 (563)
3. Cash flows from financing activities    
Issuance of own equity instruments 0 0
Disposal of own equity instruments 944 542
Acquisition of own equity instruments (4,640) (2,021)
Dividends paid (1,800) (1,643)
CASH FLOWS FROM FINANCING ACTIVITIES (5,757) (8,058)
Effect of exchange rate changes on cash and cash equivalents 1,955 (8,185)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS (16,788) (14,202)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 152,281  
CASH AND CASH EQUIVALENTS AT END OF PERIOD 138,008 175,555
Banco Santander S.A. | Reportable legal entities    
1. Cash flows from operating activities    
Consolidated profit 8,626 5,591
Adjustments to profit (5,243) 1,254
Net increase/decrease in operating assets (81,200) (15,128)
Net increase/decrease in operating liabilities 53,603 3,812
Reimbursements/payments of income tax (133) 926
CASH FLOWS FROM OPERATING ACTIVITIES (24,347) (3,545)
2. Cash flows from investing activities    
Investments (-) (3,446) (1,334)
Divestments (+) 9,999 4,186
CASH FLOWS FROM INVESTING ACTIVITIES 6,553 2,852
3. Cash flows from financing activities    
Issuance of own equity instruments 0 0
Disposal of own equity instruments 549 316
Acquisition of own equity instruments (4,350) (1,903)
Issuance of debt securities 2,327 305
Redemption of debt securities (2,212) (3,802)
Dividends paid (1,801) (1,643)
Issuance/Redemption of equity instruments 0 0
Other collections/payments related to financing activities (68) (144)
CASH FLOWS FROM FINANCING ACTIVITIES (5,555) (6,871)
Effect of exchange rate changes on cash and cash equivalents 680 (4,070)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS (22,670) (11,634)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 74,786 97,457
CASH AND CASH EQUIVALENTS AT END OF PERIOD € 52,116 € 85,823